- fix multicast virtual networks; setsockopt(SOL_IP, IP_MULTICAST_LOOP)

takes a u_char, not int as in the 0.13.0 qemu code. from mcbride@ with
name change by fgsch@.

- fix copy-and-pasto in the sample qemu-ifdown script resulting in
tun interface not being removed and errors when qemu closes. from me.

ok mcbride@(first part) fgsch@ ajacoutot@ landry@

emulators/qemu/Makefile

@@ -1,4 +1,4 @@
-# $OpenBSD: Makefile,v 1.60 2011/01/19 16:22:31 sthen Exp $
+# $OpenBSD: Makefile,v 1.61 2011/01/26 13:51:43 sthen Exp $
 
 # no success building on other archs yet
 ONLY_FOR_ARCHS =	i386 amd64 sparc64
@@ -6,7 +6,7 @@ ONLY_FOR_ARCHS =	i386 amd64 sparc64
 COMMENT =		multi system emulator
 
 DISTNAME =		qemu-0.13.0
-REVISION =		0
+REVISION =		1
 CATEGORIES =		emulators
 
 HOMEPAGE =		http://www.qemu.org/

emulators/qemu/files/qemu-ifdown

@@ -11,4 +11,4 @@ if test `id -u` -ne 0; then
 	SUDO=sudo
 fi
 
-$SUDO ifconfig $brif del $1 > /dev/null 2>&1
+$SUDO ifconfig $BRIDGE del $1 > /dev/null 2>&1

emulators/qemu/patches/patch-net_socket_c

@@ -0,0 +1,23 @@
+$OpenBSD: patch-net_socket_c,v 1.1 2011/01/26 13:51:43 sthen Exp $
+--- net/socket.c.orig	Sat Oct 16 05:56:09 2010
++++ net/socket.c	Tue Jan 25 05:57:04 2011
+@@ -154,6 +154,7 @@ static int net_socket_mcast_create(struct sockaddr_in 
+     struct ip_mreq imr;
+     int fd;
+     int val, ret;
++    u_char loop;
+     if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) {
+ 	fprintf(stderr, "qemu: error: specified mcastaddr \"%s\" (0x%08x) does not contain a multicast address\n",
+ 		inet_ntoa(mcastaddr->sin_addr),
+@@ -193,9 +194,9 @@ static int net_socket_mcast_create(struct sockaddr_in 
+     }
+ 
+     /* Force mcast msgs to loopback (eg. several QEMUs in same host */
+-    val = 1;
++    loop = 1;
+     ret=setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
+-                   (const char *)&val, sizeof(val));
++                   (const char *)&loop, sizeof(loop));
+     if (ret < 0) {
+ 	perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)");
+ 	goto fail;